Update sitemap.xml

Author: RedHeadphone

public/sitemap.xml

@@ -1,14 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<urlset
-      xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
-      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-      xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
-            http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 
 <url>
   <loc>https://codeforces-readme-stats.vercel.app/</loc>
   <priority>1.0</priority>
 </url>
 
 
-</urlset>
+</urlset>